Turret-type tool post



May 31, 1949.

G. J. BENES TURRET-TYPE TOOLPOST Filed Feb. 14. 1944 @0]7022 Jejws IN VEN T 0R,

iofleeyd Patented May 31., 1949 r.uralten emr 2,471,403 TURRETl-TYPE TOOL POST Gordon J. Benes, Chicago, Ill., assigner to Emco Mfg. Co., Chicago, Ill.

"Application February 14, 1944, Serial No. 522,334 3 Claims. (CL 2.9-48) .'ll. NT 0 ERICE 2 i* My invention relates to turret-type toolposts as screws 2@ for clamping the tools denositedltherein. "usedcon'bench lathes,'engine lathes, turret lathes The base and headpiece ofthe turretarefalined Hand Screw machines, and my main objectI is to vertically by a center post .2l slidable in matching "provide atool-supporting turret which is easily bores" 22 and made in the respective;.:parts. iadjustable to train'or set tools in desired positions D The bore 22 is chambered atthe bottom, as 'indi- *or directions. cated at 24, to seat the head 25 of theicenterpost; ""Afurtheri-object of the invention is to provide and the. latter rises from tl'ie'headpiece` reduced "aturret `of the above character which has self- Yin thicltness'by dat formations '2S on"'opposite "iin'ding and positively-engageable locating means sides.

5*for thetool-holding'elenient. l0 Fig. 3 shows the headpiece in a"iloatin'gfposi` 1 Another 'object `of the invention is to provide a tion overthe'base; and the headpiece'isintended y"fAn"important `object of the invention is to decular bottom recess 2i in the headpiece receiving `'fsignthe'improved turret with fewzparts wl'liclz 15 a similarly-formed projection 2810i thebase'for are rugged,`v durable and compactly assembled. rotary guidance or alinement. The'oatingposi- Withthe above objects in View and any others 'on of the headpiece 1s maintained by a series of "which may suggest themselves from the descripsteel `balls '23 and supporting springs between the litionitlfollow, a better understanding or the inheadpiece and the base. Thus;thebcittorn'of the ventionf'may be had by reference to the laccom- 30 headpiece is made With a shallow ball seat'f "lp'anying drawing, `in Wliicl opposite the middle region of each side ,'fandwith fFig. l is: a Yschematic plan view of a lathe `bed the headpiece and base `in the :matching'rel'ation `andcompound, showing the location of the inillustrated, a set of recesses 3l-are madefini'the proved-turret; base opposite thev ball seats '39. The recesses y3| 1 Fig.f.2 is Aair-enlarged plan view of the turret L13 are continuedwith center wells 32--inwhich-fver y' alone :in theidle or released position; *Y tical coil springs 33 are deposited. The steel balls Fig; 3=is a section on the line -S ci Fig. `2, 29 seat in the headpiece seats-3;'and Ithernorinal zfshowingfthe application ro1" the turret to the lathe length'of the springs 33 causes them-'to support compound; and the steel balls partly in the recesses -3 I.

Fig.'v Liis a cross-section of the turret Yillustrated 0 The lit of the balls 29 between'the headpiece "ini'fFign 3, vshowing it in the xedzor `engaging and base -as describedserves to locate or tentafposiftion. tively x the position of the headpiece; but-'it r:Referring specieally` to the drawing, l@ demay be rotated relative tothefbase' by: tripping ,.noteslthe bed and l l the toolfcoinpound of a typithe balls 29-and riding on them untilrthey'fseat -fcal lathe` or'slmilar machine The turretuis 5in the next or any/subsequent -positionoffthe Cmountedfonthe compound, and r'may be secured seats Si?, the springs 33 yielding to the momen-tary `"toftliecsarne rin any suitable manner. @ne method i `depressing influence of the headpiece on-thefballs of securing the turret is indicated irl-Figs. l and .29. .The arrangement of these-thus-serves-was a asa matteriofexample. Thus; the 'compound self-locatingieature for tlieheadpiece, to'setthe .issmaderwithanrinverted-T cross-slot into whose 0 same at every quarter turn. -While the locating .fzall'tintents and purposes the turret base 'may be 45 locating seats could be ornied'in the headpiece.

@considered -as'rigidly Xed to or forming apart 'of When the turret headpiece has been stopped or fthe' compound. set'in a desired position with reference v4tothe -*Therturret :base l5 is circular in contour, and basavit must be rmly secured in that lpo'sition. r'isi'designed'toreceive a square, overlapping head- For this purpose an arm 35 having a handknob :a piece :I Biromfabove. As many as four tools (not 50 '3E is employed. The base Slot the'arm isrbifturfi-shownrmay thus be mountedI horizontally in the cated, as indicated at 35i, `tofstraddlethe reduced @places-overthereceptacles i9 to;receive\socket 5 position indicated in Figs. 1 to 3, the arm 35 lies smooth and efficient action of the mechanism on its side, resting on a conical ring de which between the headpiece and the base. seats in a similarly-formed recess M in the top While I have described the invention along of the headpiece. The forks 3B of the arm e5 speci-o lines, various minor changes or refineare rounded as climbing cams 42, which are des ments may be made therein without departing signed to bear progressively on the ring de when from its principle, and I desire t Consider Such the arm 3s is swung in an u ward direction. The changes and refinements as coming within the pressure of tne earns te is transmitted to the scope and spirit of the appended claims. headpiece and on the descent thereof to the series I claim: of balls 29 as the arm 35 approaches the vertical le l. A tool-holding turret for lathes and like maposition indicated in Fig. Ll. Now the balls 29 chines comprising a base attachable on the tool seat in the bottoms of the recesses 3l tc tne exsupport of the machine, a post rising from the tent of supporting the headpiece in slightly center of the base, a tool-holding headpiece spaced relation to the base, as shown in the iigmounted on the base, said headpiece being verure last referred to. it is new evident that tne l tleally perforated for the passage and upward pressure of the arm locks the headpiece and projection of said post and rotatable about the base into one non-separable unit. ln this resame, an arm carried by the projecting part of spect, the cams t2 may be designed with a slight the post in a horizontal position and having reduction beyond the point of greatest pressure means to clamp the headpiece to the base when as the arm assumes the vertical position, so that 2o the arm is moved to vertical position, other means the arm may assume a resistance against acciin part carried by the arm and in part by the dental return. It is understood that the conical headpiece to rotate the same when the arm is ring lll is in the nature of a washer or facing turned in a substantially horizontal plane about which may be turned or even replaced in case the post, said arm being pivoted to said projectof undue wear from the cams ft2. 35 lng part by straddling the sames said clamping While the control arm 35 is primarily employed means being cams formed endwise on the stradto secure or release the headpiece of the turret, dling portions, the headpiece having a depresit is also employed to rotate the headpiece to the sion around the post defined by an inclined andesired stop. For this purpose the headpiece renular wall, and a removable wear-absorbing conceives an equidistant series of vertical pins it, 3e ical ring on the headpiece around the post an whose heads E project above the top of the headseating irl Said ClepeSSlOIi, Said Cams bearing piece to alimited extent. The base 31 of the arm down on the ring when the arm is moved as 35when lying on its side-receives a similar pin Stated t0 depress the headpleee. lll with its head ri projecting downwardly, the 2. A tool-holding turret for lathes and like location of the pin il being such that the pro- 35 machines comprising a base attachable on the jected portion of its head will strike the corretool support of the machine, a post rising from sponding portion of the first pin i5 in its path the center of the base, the latter having a set when the arm :it is swung in a horizontal plane of spaced recesses in the upper portion thereof to turn with the center post 2l. The headpiece with each recess seating a spring-pressed ball, of the turret may thus be rotated from any point e tOOl-lloldrls headpiece including a bottom surwhere the horizontally positioned arm 35i may face having a series of shallow recesses for rebe located. The meeting faces of the pin heads ceiving said balls and resting on the uppel` Sill'- Ae and to are preferably cnarniered flat, as indiface of said base, said headpieee being vertically cated at ric, for better contacting engagement. perforated for the passage and upward projection Fig. 2 snows that the series of pins te is stag- 45 of said post and rotatable about the same, an gered to some extent in respect to the ball rearm carried by the projecting part of the post cesses to in order te definitely clear the latter in a horizontal position, means adapted to be when tne pin holes are drilled, since it is irnpressed by the arm to clamp the headpieoe to material at what point of horizontal sweep tne r the base when the arm is moved to vertical posicontrol arm 35 stops or acts, as long as it retains lo t`10i1, and spelled ineens pTOl'eCtlIlg from the 11pits central clamping influence and finds a pin per surface of the headpiece in staggered relahead te to engage on a partial turn when the tion to said ball recesses engageable by said arm headpiece is t0 be rotated, to rotate the headpiece when the arm is turned it will be evident that r have provided a toolin a substantially horizontal plane about the posty holding turret which employs the efficient prin- Seid means t0 Clamp the headpleee t0 the bese ciple of a cam arrn to clamp it tight. This it couincluding a tapered seat formed Centrally in the ples with `the oating support of the headpiece '130D 0f tlle heed-piece, and e Wear-alOSOIbhg Ting which incorporates the self-locating feature. The Seetetl therein erlgageable by said arm. latter is distributed to afford uniformity both in 3- A tOOl-hOlCllhg turret fOr lathes and like mathe floating Support, and the Clamping of the turchinos comprising a base attachable on the tool ret to serve as a rigid unit after the tool-holding Support of the machine a post rising from the center of the base, the latter having a set of spaced recesses in the upper portion thereof with each recess seating a spring-pressed ball, a toolholdng headpiece including a bottom surface having a series of shallow recesses for receiving headpiece has been turned to the desired position. The internal matching elements between the headpiece and the base insure vertical and c5 rotary alinement between these members, while the overhangng marginal flange @3 of the head' said balls and resting on the upper surface of piece forms a closure against the entranceof Said base Sad headpece being Vert-cally perf metal shavlngs or dust into the space occupied fated for the passage and upward projection of by the balls 29 and Springs 32- The Simple Coll- 70 said post and rotatable about the same, an arm trol arm is maneuverable with o-ne hand to either carried by the projecting part of the post in a tllrll Ol Clamp the heedpleee, making -1t easy t0 horizontal position, means adapted to be pressed Operate the tllilet- Finally, the latter lYlCOipO by the arm to clamp the headpiece to the base rates the above described features in a sturdy and when the arm is moved to vertical position, and

compact unit which is formed to facilitate the spaced means projecting from the upper surfact said seat and engageable by said arm.

GORDON J. BENES.

REFERENCES CITED The following references are of recordin the le of this patent:

6 UNITED STATES PATENTS Number Number Germany May 28, 1925 

